[Haskell-beginners] repetition

[Henk-Jan van Tuyl]

On Thu, 04 Aug 2011 11:31:02 +0200, Luca Ciciriello  
<luca_ciciriello at hotmail.com> wrote:

> Hi All.
> Is there any function in Prelude that removes the repeated elements in a  
> list?
>
> In example I've a list like this one: xs =  
> ["3","3","3","3","3","4","4","4","4","4","5","5","5","5","5","6","6","6","6","6","6","6"]
>
> I need a function f such that f xs = ["3","4","5","6"]
>

Not in Prelude, but in Data.List:
   nub

Prelude Data.List> nub  
["3","3","3","3","3","4","4","4","4","4","5","5","5","5","5","6","6","6","6","6","6","6"]
["3","4","5","6"]

Regards,
Henk-Jan van Tuyl


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